Measuring temperature by isobaric method in heavy-ion collisions

Temperature is a key important parameter in heavy-ion collisions, which not only reflect the strength of the collision, but also relates to some important parameters, for example, the symmetry energy of nuclear matter. Few methods measuring the temperature of heavy fragments were found in literatures. Based on the correlation between the yield of fragment and its free energy and temperature, we developed the isobaric method to measure the temperature of heavy fragment. In this report, we introduce the measuring methods and comparing the result by the isobaric methods. (authors)